<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<body>
<script src="../js/vue.js"></script>
<div id="app">
  <h2>{{message}}</h2>
  <h2>{{message}},朱同</h2>
  <h2>{{firstName+lastName}}</h2>
  <h2>{{firstName+' '+lastName}}</h2>
  <h2>{{firstName}},{{lastName}}</h2>
  <h2>{{count*2}}</h2>
</div>

</body>

<script>
  const app = new Vue({
    el: '#app',
    data: {
      message: "你好啊",
      firstName: "kobe",
      lastName: "bryant",
      count: 100

    }
  })
</script>

</body>
</html>